—— 请按键盘 空白键 开始游戏 ——

结社的能力反过来取决于社区分享规范和价值观的程度,以及能够将个人利益服从于更大群体利益的程度。
"The most profound truths are found in contradictions."
Materials themselves are not important; what matters is how you use them.
数学不是一项观赏性运动。